Add expand/collapse for countdown (resize still needs work)

* Start work on a REST API
Implement the REST API. (Sort of).

TODO: Make accessible by 3rd parties
Doge link, some small changes.
School holidays modifications/fixes
Some fixes
Merge branch 'master' of git://github.com/sbhs-forkbombers/sbhs-timetable into april-fools

Conflicts:
	index.php
	login.php
	style/common.css
School holidays fixes